1) Being behind 2) Bringing about 3) Causative 4) Causing 5) Concerning a catalyst 6) Constituting a catalyst 7) Contributing 8) Contributory 9) Expressing a reason 10) Implying a reason 11) Implying an origin 12) Involving a motive 13) Kind of agent 14) Kind of link 15) Kind of relationship 16) Leading to something Found on https://www.crosswordclues.com/clue/causal
• (n.) A causal word or form of speech. • (a.) Relating to a cause or causes; inplying or containing a cause or causes; expressing a cause; causative. Found on http://thinkexist.com/dictionary/meaning/causal/
Caus'al adjective [ Latin causalis . See Cause .] Relating to a cause or causes; inplying or containing a cause or causes; expressing a cause; causative. « Causal propositions are where two propositions are joined by causal words. Watts. » Found on http://www.encyclo.co.uk/webster/C/39
Caus'al noun A causal word or form of speech. « Anglo-Saxon drencan to drench, causal of Anglo-Saxon drincan to drink. Skeat. » Found on http://www.encyclo.co.uk/webster/C/39
adjective involving or constituting a cause; causing; `a causal relationship between scarcity and higher prices` Found on https://www.encyclo.co.uk/local/20974